Configure the vault according to the installation specifications provided by the irrigation consultant. It must rest upon a compacted base material per the field specifications. If the vault is to be set directly upon the gravel within the drainage system, the gravel should be compacted and the vault set upon six or more bricks for stabilization. The elevation to the grade of the vault must be precise. It is determined by the field and irrigation specifications. In many installations, the elevation for the vault is specified such that the upper rim of the vault is level with the upper rim of the tack/glue board that surrounds the field. The vault’s elevation may also be affected by the type of material, if any, that will be attached to the vault’s upper surface. This can include the field’s synthetic “carpet” or the adjacent running track material. Some customers prefer no cover attachments. When installing the ST-1600-KIT, be aware of the direct and required relationship between the location of the vault, the location of the incoming plumbing, and the location and depth of the drainage system. For the irrigation sprinkler (rotor) to be properly positioned within the hole in the vault’s cover set, the inlet piping must be placed at the specified location and depth. In order for the quick coupler valve to be accessible and functional once installed, the quick coupler’s supply pipe must be installed in the correct location and the valve must be at the correct height within the vault.
For the vault to drain properly, it must be connected to the drainage system, and the drainage system must be lower in elevation than the vault’s 36" (91 cm) base. Otherwise, the vault can partially fill with water. Isolating the vault from the drainage could cause the vault to fill with water during heavy precipitation events.